NC hybrid setup/coolant blows heater core/how to avoid?

[Greg Hermann]

>Howard, I don't know any data specific terms to the heater core failures my
>southern friends experienced (I'm in BC and they're all in the US) but it
>always went during a WOT dust off of some other hipo car.  They replaced
>initially w/ junkyard units, they failed, then with several Nissan units to
>find they failed under same circumstances.  My inexperienced slant at it is
>they had  a far higher volume/flow than that heater core would normally
>experience d/2 their rate of acceleration/ hybrid chevy systems/ and most
>likely the Nissan pumps weren't designed for this flow.  If not designed
>for that flow and given much higher flow than OEM it could create higher
>pressure than they were designed for given their has to be restrictions in
>the heater core system leading to this pressure increase (if flow isn't
>accomodated pressure goes up).  I agree w/ you that static pressure as you
>described shouldn't be a problem as the systems are very similar in design
>pressures and all related components were in as new condition.
>
Your evaluation is spot on, Ross!

If the higher pump head pressure from the larger, faster turning water pump
did not get the cores immediately, the pitting corrosion from the higher
flow velocities than intended would get them before too long.

Regards, Greg